CN106170751A - Touch panel conducting strip and capacitive touch panel - Google Patents

Touch panel conducting strip and capacitive touch panel Download PDF

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Publication number
CN106170751A
CN106170751A CN201580019272.9A CN201580019272A CN106170751A CN 106170751 A CN106170751 A CN 106170751A CN 201580019272 A CN201580019272 A CN 201580019272A CN 106170751 A CN106170751 A CN 106170751A
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China
Prior art keywords
detecting electrode
touch panel
metal grill
fine rule
metallic conductor
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Granted
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CN201580019272.9A
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Chinese (zh)
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CN106170751B (en
Inventor
中山昌哉
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Fujifilm Corp
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Fujifilm Corp
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0448—Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Position Input By Displaying (AREA)

Abstract

The disconnection of produced conducting strip during the processing and forming of conducting strip is implemented in suppression in order to obtain the touch panel of three-dimensional (three-dimensional) shape.2nd touch panel conducting strip (12) is formed: multiple tops detecting electrode (26), is configured at detection region；And multiple 2nd terminal wiring part (36) (periphery distribution), it is configured at periphery distribution region, for being electrically connected with the 2nd portion of terminal (44,46) by top detecting electrode (26).Netted 1st metal grill that top detecting electrode (26) is intersected by metallic conductor fine rule (28) and constitutes is constituted, and the 2nd terminal wiring part (36) by with is formed above the metallic conductor fine rule (28) of metallic conductor fine rule (28) identical material of detecting electrode (26) intersect and netted the 2nd metal grill composition that constitutes.Here, the live width of the 1st metal grill is set as below 5 μm, the bearing of trend of the metallic conductor fine rule (28) constituting the 1st metal grill and the 2nd metal grill tilts relative to the sweep direction of the bending section of the 2nd resin film (24).

Description

Touch panel conducting strip and capacitive touch panel
Technical field
The present invention relates to one have and be formed with multiple detecting electrode and for being electrically connected with portion of terminal by described detecting electrode The multiple periphery distributions connect and the touch panel conducting strip of the resin film in 3D shape and capacitive touch panel.
Background technology
As multifunctional mobile telephone (smart mobile phone) or the display device of digital camera, personal computer etc., extensively adopt With the so-called touch panel that can carry out various operation by using finger to touch.In the past, this touch panel was as behaviour It is that the so-called two-dimensional shapes body of plane is popularized as face, but recently been proposed the bending of the end of operating surface is arranged side And on this side, it also is able to carry out the touch panel of the 3D shape that touch panel is representative (three-dimensional shape) body operated.Example As, there is the touch panel that operating surface is in curved surface disclosed in patent documentation 1.
Touch panel has resin film, and described resin film is formed with detecting electrode and for by this detecting electrode and end The periphery distribution of sub-portion electrical connection.In order to obtain 3D shape body, need to bend this resin film, but now, such as patent literary composition Offering described in 2, such as periphery distribution is together bent with resin film.
Prior art literature
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2012-242871 publication (referring especially to Fig. 2)
Patent documentation 2: International Publication the 2012/132846th (referring especially to Fig. 1)
Summary of the invention
The technical task that invention is to be solved
When resin film being implemented three-dimensionally shaped processing and manufacture experimently out touch panel, detecting electrode or periphery distribution have May produce and disconnect.Disconnect position and be mainly detecting electrode or the crooked position of periphery distribution, but the most observed at other positions Arrive.
The reason disconnected is studied by the present inventor, and result has been distinguished to result from and carried out three-dimensionally shaped adding adding of man-hour Heat.That is, obtained being because the resin film opinion that locality extends because of heating.
The locality extension of resin film not only only occurs in the specific paries such as crooked position, also occurs at irregular portion Position.Therefore, it is difficult to prevent that locality extends, is therefore not easy to avoid disconnecting.
The present invention completes to solve the problems referred to above, its object is to provide one both to have and implements three-dimensional one-tenth The resin film of type processing can also suppress touch panel conducting strip and the capacitive touch panel disconnected.
For solving the means of technical task
Described purpose is achieved by the structure of following [1].
[1] a kind of touch panel conducting strip, it has resin film, and resin film is in the three-dimensional shaped with bending section Shape, described resin film is formed: multiple detecting electrodes, is configured at detection region；And multiple periphery distribution, it is configured at periphery and joins Line region, for detecting electrode is electrically connected with portion of terminal, wherein, the net that detecting electrode is intersected by metallic conductor fine rule and constitutes 1st metal grill of shape is constituted, and periphery distribution is by the metallic conductor with the identical material of metallic conductor fine rule forming detecting electrode The 2nd netted metal grill that fine rule intersects and constitutes is constituted, and the live width of the 1st metal grill is below 5 μm, constitutes the 1st gold medal The bearing of trend of the metallic conductor fine rule of genus grid and the 2nd metal grill is relative to the sweep direction of the bending section of resin film Tilt.
Here, 3D shape refer to due to resin film there is crooked position and operating surface spatially shape rather than in Two dimension tabular surface.Bending can be the bending relaxed, it is also possible to be precipitous warpage.Further, " tilt " to refer to bearing of trend phase For sweep direction parallel and vertical in the case of beyond situation.
In the present invention, both detecting electrode and periphery distribution are made up of the grid of metallic conductor fine rule.For grid, Tracing ability when resin film extends is good.Therefore, the crooked position when three-dimensionally shaped processing (bending) or other portions are followed Position locality produce extension and extend.Further, owing to periphery distribution is formed by the metal fine of identical material with detecting electrode, Therefore, it is possible to the border non junction of periphery distribution and detecting electrode is formed, therefore, it is possible to prevent three-dimensionally shaped processing (bending) Time the disconnection of joint.
Therefore, it is possible to prevent detecting electrode and periphery distribution from disconnecting or therefore resistance rising.It addition, form detection The live width of the 1st metal grill of electrode is below 5 μm.Further, in both detecting electrode and periphery distribution, metallic conductor is thin The bearing of trend of line intersects rather than parallel and vertical with predetermined angular with sweep direction.Therefore, with bearing of trend relative to Parallel and the vertical situation in sweep direction is compared, and is not susceptible to cut off.I.e., it is possible to suppression is cut off further.Accordingly, it is capable to Enough constitute the three-dimensional tactile panel that detection sensitivity is good and visuognosis degree is also excellent.
[2] region of preferred resin thin film at least one in comprising detecting electrode or periphery distribution has bending section.
According to the structure of above-mentioned [1] by grid protocol detecting electrode and periphery distribution, can suppress to disconnect.Therefore, i.e. Make to comprise in the way of detecting electrode or periphery distribution in the case of bent resin thin film, it is also possible to avoid detecting electrode or week Limit distribution disconnects.
[3] bearing of trend of metallic conductor fine rule of the 1st metal grill and the 2nd metal grill is preferably comprised relative to resin The sweep direction of the bending section of thin film tilts with the angle of 20 °～70 °.
By the bearing of trend of metallic conductor fine rule with sweep direction with above-mentioned angular cross, it is possible to suppression is sent out further Raw cut-out.
[4] average meshes of the preferably the 2nd metal grill is smaller than the average meshes spacing of the 1st metal grill.
Now, it is possible to by periphery distribution low resistance.Its result, touch panel becomes high sensitivity.
[5] the average meshes spacing of the preferably the 2nd metal grill is 10～50 μm.
By so setting average meshes spacing, it is possible to realize the low resistance of periphery distribution, and can be real further Now disconnect prevents.
[6] live width of the preferably the 1st metal grill and the 2nd metal grill is identical.
In the case of the live width difference of the 1st metal grill and the 2nd metal grill, it is particularly present the portion that live width local is thinner During position, carry out resin film three-dimensionally shaped adding man-hour, easily concentrate generation stress at this thinner position, be therefore susceptible to Disconnect.In order to prevent this phenomenon, it is also preferred that the live width of the 1st metal grill and the 2nd metal grill is set to identical.That is, by inciting somebody to action The live width of two kinds of grids is set to identical, it is possible to be effectively prevented the three-dimensionally shaped disconnection adding man-hour, it is possible to constitute productivity ratio more Excellent three-dimensional tactile panel.
[7] preferably detect in region, at least at adjacent detecting electrode, there is the 1st stress dispersion portion each other, described Insulating with both detecting electrode and periphery distribution in 1st stress dispersion portion, and has the surface density identical with the 1st metal grill.
[8] and, the preferably the 1st stress dispersion portion is made up of following metal grill, described metal grill by with constitute detection The metallic conductor fine rule of the identical material of metallic conductor fine rule of electrode intersects and constitutes, and in the net identical with the 1st metal grill Trellis shape.
[9] additionally, it is preferred that in periphery distribution region, at least having the 2nd each other at adjacent described periphery distribution should Power dispersion portion, described 2nd stress dispersion portion and described detecting electrode and the insulation of described both periphery distributions, and have with described The surface density that 2nd metal grill is identical.
[10] and, the preferably the 2nd stress dispersion portion is made up of following metal grill, described metal grill by with constitute periphery The metallic conductor fine rule of the identical material of metallic conductor fine rule of distribution intersects and constitutes, and in the net identical with the 2nd metal grill Trellis shape.
Above, the surface density of so-called metal grill represents the metallic conductor fine rule constituting metal grill portion in unit are Amount, it is possible to obtain according to following (1) formula.
The thickness of the metallic conductor fine rule occupation rate × metallic conductor fine rule in surface density=α × metal grill portion ... (1)
It addition, the volume weight density that α is metallic conductor fine rule.
By arranging the 1st stress dispersion portion or the 2nd stress dispersion portion, in detection region or periphery distribution region, stress It is uniformly dispersed.Therefore, it is possible to prevent resin film locality from extending.Therefore, it is possible to suppression disconnects or resistance rises further.
[11] preferably constitute the metallic conductor fine rule of detecting electrode at least 1 of detecting electrode be internally formed to disconnect Stress easing portion.
In this case, if the resin film corresponding with the inside of detecting electrode extends, the stress the most now produced leads to Overstress easing portion is relaxed.It can thus be avoided the carrying out of the disconnection caused by stress.Therefore, it is possible to prevent further Resistance rises.
[12] stress easing portion can be formed by the metallic conductor fine rule locality constituting detecting electrode being disconnected.
The shape of [13] the 1st metal grills can be set to random pattern.It addition, random pattern refers to owing to forming grid electricity The shape of multiple unit of pole or size is different and pattern that the periodicity of unit (systematicness or uniformity) is relatively low.
In the grid electrode that the random pattern being connected by the irregular unit such as shape or size is constituted, the most relatively low. Therefore, with field of view angle independently now, the folded stricture of vagina of pattern of pixels with display device it is not susceptible to.
[14] shape of the preferably the 2nd metal grill is set to the pattern that shapes.
[15] preferred resin thin film be curved as inner side by will be formed with the face of detecting electrode and periphery distribution and In 3D shape.
When the face that will be formed with detecting electrode and periphery distribution is curved as inner side, it is curved with as outside Time compare, the elongation of detecting electrode and periphery distribution reduces.Therefore, it can suppress further to disconnect.
[16] and, the present invention is to possess the capacitive touch panel of touch panel conducting strip as constructed as above.
Invention effect
According to the present invention, the grid protocol of metallic conductor fine rule it is arranged at detecting electrode and the periphery distribution of resin film Both, and the live width forming the 1st metal grill of detecting electrode is set to 5 μm, and make the extension side of metallic conductor fine rule Tilt to the sweep direction relative to bending section.For grid, tracing ability when resin film extends is good.That is, follow It is easier to extend at the three-dimensionally shaped crooked position adding man-hour or the extension of other position locality generations.It addition, metal Conductor fine rule is not parallel relative to sweep direction and out of plumb, therefore, it is possible to the disconnection being effectively prevented in bending section.
It can thus be avoided detecting electrode and week distribution disconnect.Accordingly it is possible to prevent result from disconnection and on resistance Rise.Therefore, it is possible to provide detection sensitivity good and absorbance, the three-dimensional tactile panel of visuognosis degree excellence.
Accompanying drawing explanation
Fig. 1 is the electrostatic capacitive that will comprise the touch panel conducting strip involved by embodiments of the present invention and constitute Approximate vertical view shown in touch panel expansion.
Fig. 2 is the major part general profile chart of the thickness direction of the capacitive touch panel along Fig. 1.
Fig. 3 is to represent be made up of metallic conductor fine rule and be formed on described conducting strip the unit of the detecting electrode formed The approximate vertical view of one example.
The approximate vertical view of one example of unit when Fig. 4 is to represent detecting electrode formation random grid pattern.
Fig. 5 is an example of the approximate vertical view of described touch panel conducting strip.
Fig. 6 is the major part general profile chart of the capacitive touch panel of the sweep C1 vicinity in Fig. 1.
Fig. 7 is the major part general profile chart of the capacitive touch panel of the sweep C2 vicinity in Fig. 1.
Fig. 8 be adjacent detecting electrode be formed each other stress dispersion portion conducting strip approximate vertical view one Example.
Fig. 9 is that each other and adjacent periphery distribution is respectively formed with stress each other and divides at adjacent detecting electrode One example of the approximate vertical view of the conducting strip in the portion of dissipating.
Figure 10 is an example of the approximate vertical view of the conducting strip being provided with stress easing portion in the inside of detecting electrode.
Figure 11 is detecting electrode and detection above its back side is formed below the one side of same resin film is formed The major part general profile chart of the capacitive touch panel of electrode.
Figure 12 is to make dielectric film between lower section detecting electrode and top detecting electrode and will be formed with top detection electricity The major part diagrammatic sectional view of the capacitive touch panel that the resin film of pole and cover-plate glass (cover lens) are fitted Figure.
Figure 13 is to will only be in side to be formed with the resin film of detecting electrode and fit in the electrostatic capacitive of cover-plate glass and touch Touch the major part general profile chart of panel.
Figure 14 is the electrostatic capacitance that lattice is generally square shape of both detecting electrode and terminal wiring part The major part general profile chart of formula touch panel.
Detailed description of the invention
Hereinafter, for touch panel conducting strip involved in the present invention, utilize and possess this touch panel conducting strip Capacitive touch panel between relation, enumerate preferred implementation and be described in detail with reference to accompanying drawing.
It addition, in this specification, expression numerical range "～" it is as lower limit as the numerical value that it is the most described Value and higher limit and the implication that comprises and use.Further, " top " refers to the display near visuognosis band three-dimensional tactile panel The side (exterior side) of the spectator of device, and " lower section " refers to the side (inner face side) of spectator.
Fig. 1 is will to comprise the 1st touch panel conduction as the touch panel conducting strip involved by present embodiment Sheet 10, the 2nd touch panel conducting strip 12 and the touch panel 14 (capacitive touch panel) that constitutes launch shown in general Slightly top view, Fig. 2 is the major part general profile chart of through-thickness.This touch panel 14 is by being engaged in not shown showing Showing device and constitute the display device of band three-dimensional tactile panel.
It addition, display device is not particularly limited, as its preferred example, can enumerate liquid crystal display, etc. from Daughter display, organic el display (Organic Electro-Luminescence), inorganic EL display, Electronic Paper etc..
Touch panel 14 has the laminated conductive sheet 16 as sensor main body, not shown described control circuit and covering The cover-plate glass 18 (with reference to Fig. 2) of the upper surface of touch panel 14.As in figure 2 it is shown, laminated conductive sheet 16 therein is by this reality Execute the 1st touch panel conducting strip 10 involved by mode and the 2nd touch panel conducting strip 12 stacking and constitute.
1st touch panel conducting strip 10 has the 1st resin film 20 and is formed at the one side of the 1st resin film 20 Multiple lower sections detecting electrode 22.On the other hand, the 2nd touch panel conducting strip 12 has the 2nd resin film 24 and is formed at this The top detecting electrode 26 of the one side of the 2nd resin film 24.Here, lower section detecting electrode 22 is 1 pair of electrode of touch panel 14 In away from the electrode of side of touch surface (operating surface), and top detecting electrode 26 be touch panel 14 1 pair of electrode in close The electrode of the side of touch surface.
1st resin film 20 is the transparent body, such as by polyethylene terephthalate (PET), PEN (PEN) polyesters such as；The TPO such as polyethylene (PE), polypropylene (PP), polystyrene, polyethylene vinyl acetate (EVA)； Vinyl group resin；Additionally, Merlon (PC), polyamide, polyimides, allyl resin, triacetyl cellulose (TAC), ring Olefin polymer (COP), cyclic olefine copolymer (COC) etc. are constituted.The absorbance of the 1st resin film 20 is preferably more than 85%.
Further, thickness preferably 20～350 μm of the 1st resin film 20, further preferred 30～250 μm, particularly preferred 30 ～100 μm.
Lower section detecting electrode 22 has the figure of multiple bandings that the 1st direction (x direction/length direction) along Fig. 1 extends Case.Here, " banding " refers to the width size with regulation and the elongate in shape extended, width size periodically becomes Dynamic (repeating expanding and contracting width) shape is also contained in " banding ".Top detecting electrode 26 in the most identical.
Lower section detecting electrode 22 has the width of the regulation towards the 2nd direction (direction orthogonal with the 1st direction: y direction) Direction size, and multiple configure side by side along this y direction.It addition, the 1st direction is the direction vertical relative to the paper in Fig. 2, 2nd direction is the left and right directions of the paper in Fig. 2.
Detection region refers to link and by this connecting line each end (long limit or minor face) of detecting electrode the most virtually In the region surrounded.That is, in all of lower section detecting electrode 22 is formed at detection region.For top described later detecting electrode 26 The most identical.
As it is shown on figure 3, each lower section detecting electrode 22 is intersected with each other and formed by metallic conductor fine rule 28.With this intersection And form multiple space (peristome) the i.e. the 1st unit 30 surrounded by metallic conductor fine rule 28.It addition, metallic conductor fine rule 28 by Silver, copper, gold, aluminum, molybdenum, chromium, nickel or the alloy containing more than a kind in these etc. are constituted.Wherein, examine from the viewpoint of electric conductivity Consider, particularly preferably silver.
In this case, the 1st unit 30 is each other in same shape.That is, metallic conductor fine rule 28 the lower section detection formed The 1st metal grill that electrode 22 is connected by the 1st unit 30 of multiple same shapes is formed, in so-called setting pattern.
1st unit 30 such as parallelogram shape, typically equal in the length on 4 limits diamond shape is (with reference to figure 3).In this case, the rhombus grown crosswise it is not limited to, naturally it is also possible to be the rhombus of lengthwise.The angle on the summit of rhombus is excellent There is not folded stricture of vagina in the choosing pattern of pixels being designed as with display device.
In the 1st unit 30, width size (live width) W1 of metallic conductor fine rule 28 is set as below 5 μm.Further, Averaging unit spacing P1 (fine rule interval) of the 1st unit 30 can be set as 100 μm～500 μm.Thus, it is possible to improve by metal The folded stricture of vagina of the conductive pattern that conductor fine rule 28 causes and fine rule visualization, absorbance is higher and visuognosis degree becomes good.That is, It is difficult to visuognosis and forms the metallic conductor fine rule 28 of the 1st metal grill.
Further, when the aperture opening ratio (the non-occupation rate of metallic conductor fine rule 28) of the 1st unit 30 is identical, live width is the least, structure Below one-tenth, the quantity of the metallic conductor fine rule 28 of detecting electrode 22 more increases.Therewith, the disconnection of detecting electrode 22 below prevention Effect uprises.Especially, when aperture opening ratio up to more than 94.0% of the 1st unit 30, by the live width by metallic conductor fine rule 28 W1 is set to below 5 μm, it is possible to increase to the number of the metallic conductor fine rule 28 of per unit area can effectively prevent lower section The number of the disconnection of detecting electrode 22.
If it addition, live width W1 of metallic conductor fine rule 28 is too small, then the bendability of this metallic conductor fine rule 28 itself declines. Therefore, it is likely to occur disconnection when laminated conductive sheet 16 being set to three-dimension curved surface body.In order to reduce its probability, preferably by metal Live width W1 of conductor fine rule 28 is set to more than 1 μm.When live width W1 is this degree, additionally it is possible to guarantee to fill to lower section detecting electrode 22 The electric conductivity divided.
Fig. 1 and Fig. 3 records the example of rhombus, but the 1st unit 30 can also be by square, hexagon or triangle The setting pattern constituted on other polygons.Or, can be the pattern (random pattern) being made up of random grid electrode, described Random grid electrode is connected with each other by the irregular random cells of shape or size and is formed.
It is the lower section detecting electrode 22 during random cells for the 1st unit 30, one is illustrated in Fig. 4.Now, with shade The 1st unit 30 that line represents is by metallic conductor fine rule 28p summit V1 and summit V2 straight line linked, by summit V2 and summit The metallic conductor fine rule 28q that V3 links with straight line, the metallic conductor fine rule 28r that summit V3 and summit V4 straight line are linked and The metallic conductor fine rule 28s that summit V4 and summit V1 links with straight line is formed, and in polygonal shape.(the 1st is single for other unit Unit 30) too in polygonal shape.So, random grid electrode refers to the shape of unit or size is different from each other and periodicity The grid electrode that (systematicness or uniformity) is relatively low.
It addition, random pattern such as can be by her (Voronoi) split-run or De Luonai (Delaunay) three of voronoi Dihedral split-run sets shape.Japanese Unexamined Patent Publication 2013-54619 it is described in detail for setting the specific works etc. of random pattern ＜ 0080 ＞～the ＜ 0083 ＞ section of publication.
The difference of the unit size in random grid electrode i.e. random rates is preferably 2～20%, more preferably 4～10%. More preferably 6～8%.Here, random rates is defined as, take out any 30 the 1st unit 30 constituting random grid pattern, In length Ld on one side of each 1st unit 30, maximum is set to Ldmax, minima is set to Ldmin, meansigma methods is set to During Ldave, each unit extracts value bigger in the value obtained by following (2) formula and (3) formula out, and takes the meansigma methods of 30, It is random rates.
(Ldmax-Ldave)/Ldave×100……(2)
(Ldave-Ldmin)/Ldave×100……(3)
If random rates is less than 2%, the unit size of the most each 1st unit 30 becomes almost consistent, based on multiple 1st unit 30 The effect of the arrangement folded stricture of vagina of suppression reduce.On the contrary, if random rates is more than 20%, then the resistance value of lower section detecting electrode 22 produces partially Differ from and be likely to result in detection sensitivity and decline.Further, display picture likely produces granular noise sense.
Averaging unit spacing P1 of lower section detecting electrode 22 configured as described above (the average meshes spacing of the 1st metal grill/ With reference to Fig. 3) it is preferably 100～500 μm, more preferably 100～400 μm.Here, with regard to the average list of lower section detecting electrode 22 For unit's spacing P1, the maximum of the 1st unit 30 in the x direction that detecting electrode 22 is extended below mensuration in any 30 unit Length, is defined with its average length.
Join as it is shown in figure 1, be electrically connected with via the 1st wire connecting portion 32 at the one end of each lower section detecting electrode 22 as periphery 1st terminal wiring part 34 of line.So, by arranging the 1st wire connecting portion 32, from the 1st terminal wiring part 34 detecting electrode downwards The flowing of the electric current of 22 becomes smooth and easy, has the effect of the sensitivity improving touch panel 14.Alternatively, it is also possible to be to be not provided with The structure that 1 wire connecting portion 32 and the 1st terminal wiring part 34 using lower section detecting electrode 22 with as periphery distribution directly electrically connect.
1st terminal wiring part 34 is arranged towards the substantially central portion on the one side extended along the 2nd direction (y direction), and with 1st portion of terminal 35 electrically connects.1st portion of terminal 35 electrically connects with not shown described control circuit.
Periphery distribution region refers to be formed in the region of the 1st terminal wiring part 34.That is, all of 1st terminal wiring part 34 are formed in periphery distribution region.The most identical for the 2nd terminal wiring part 36 described later.
Fig. 1 illustrates the enlarged drawing of the part surrounded by circle in the lump.From this enlarged drawing, in present embodiment, the 1st end The 2nd metal grill that sub-wiring part 34 is connected by the 2nd unit 38 of multiple same shapes is formed.1st terminal wiring part 34 In setting pattern.It addition, when arranging 1 wire connecting portion 32, the 1st wire connecting portion 32 is also formed by the 2nd metal grill.1st wiring The grid cell shape in portion 32 can be the shape identical with the 2nd unit 38, it is also possible to different.
2nd unit 38 such as parallelogram shape, typically in the diamond shape that the length on 4 limits is equal.Now, and It is not limited to the rhombus grown crosswise, naturally it is also possible to be the rhombus of lengthwise.
Fig. 5 enumerated the example of rhombus, but the 2nd unit 38 can also be by tetragon, hexagon or triangle etc. its The setting pattern that his polygon is constituted.For the purpose of reducing resistance value, the shape of the 2nd unit 38 is preferably set to rhombus, square Or equilateral triangle.In periphery wiring part, not by folded stricture of vagina etc. and the visuognosis degree phase of absorbance and the pattern of pixels of display device The restriction closed.Therefore, even if the 2nd unit 38 is set to this shape, without worrying decrease in transmission or folded stricture of vagina occurring.
The 1st wire connecting portion the 32 and/or the 1st terminal wiring part 34 (the 2nd wire netting trrellis diagram being made up of the 2nd metal grill pattern Case/the 2nd unit 38) concurrently form during detecting electrode 22 (the 1st metal grill pattern/the 1st unit 30) below being formed.Now, Constitute the 2nd metal grill of the 2nd unit 38 by thin with the metallic conductor of the 1st identical material of metal grill constituting the 1st unit 30 Line is constituted.It is therefore preferable that metallic conductor is thin in the 1st unit 30 (the 1st metal grill) and the 2nd unit 38 (the 2nd metal grill) The thickness of line is the most identical.In this specification, " identical material " refers in metallic conductor fine rule contained binding agent, forms alloy Each composition contained in the kind of metal and ratio etc., metallic conductor fine rule and ratio of components is the most identical rather than finger-type becomes The major metal of metallic conductor fine rule is identical.Further, in this specification, " thickness is identical " refers to that thickness is substantially the same.Specifically For, it is defined as the difference of the thickness situation within 5%.
Further, preferably in the 1st unit 30 (the 1st metal grill) and the 2nd unit 38 (the 2nd metal grill), metallic conductor is thin The live width of line is the most roughly the same.Therefore, in this case, when the line of metallic conductor fine rule of the 1st unit 30 (the 1st metal grill) Wide when being such as set as 4 μm, the live width of the metallic conductor fine rule of the 2nd unit 38 (the 2nd metal grill) also becomes 4 μm.This explanation In book, " live width is identical " refers to that live width is substantially the same.Specifically, the difference of the live width situation within 0.5 μm it is defined as.
Further, owing to concurrently forming composition the 1st wire connecting portion the 32 and the 1st terminal wiring part 34 when forming Unit 30 1 2nd unit 38, therefore lower section detecting electrode the 22, the 1st wire connecting portion the 32 and the 1st terminal wiring part 34 by metallic conductor fine rule 28 without connecing Head ground is connected (becoming seamless).Therefore, to the border of lower section detecting electrode the 22 and the 1st wire connecting portion 32 and the 1st wire connecting portion 32 with The metallic conductor fine rule 28 of the boundary of the 1st terminal wiring part 34 brings the sufficient intensity for three-dimensionally shaped processing.
Further, though be not provided with the 1st wire connecting portion 32 and using lower section detecting electrode 22 and the 1st terminal as periphery distribution In the case of the structure that wiring part 34 directly electrically connects, owing to concurrently forming composition the 1st terminal distribution when forming Unit 30 1 2nd unit 38 in portion 34, the most as described above, lower section detecting electrode the 22 and the 1st terminal wiring part 34 is also by metallic conductor It is connected (becoming seamless) fine rule 28 non junction.Therefore, in this case, also can be to lower section detecting electrode the 22 and the 1st terminal The metallic conductor fine rule 28 of the boundary of wiring part 34 brings the sufficient intensity for three-dimensionally shaped processing.
It addition, the live width of the 2nd unit 38 is preferably set to more than 1 μm in the same manner as the 1st unit 30.This is present to ensure that fully Bendability and electric conductivity.
Further, the live width of the 2nd unit 38 is preferably set to below 10 μm.This is because, if the live width and the 1st of the 2nd unit 38 The difference of the live width of unit 30 becomes more than 10 μm, then it is contemplated that the boundary changed in the live width of metallic conductor fine rule 28 Likely it is susceptible to disconnect.
For averaging unit spacing P2 (the average meshes spacing of the 2nd metal grill) of the 1st terminal wiring part 34, in office Anticipate and 30 unit measure the greatest length of the 2nd unit 38 that the bearing of trend along the 1st terminal wiring part 34 is connected, with it Average length is defined.
The averaging unit spacing of averaging unit spacing P2 of the 1st terminal wiring part 34 preferably smaller than lower section detecting electrode 22 P1.This is because, it is possible to realize the low resistance of the 1st terminal wiring part 34.Between the averaging unit of the 1st terminal wiring part 34 It is preferably 10 μm～50 μm away from P2.
It addition, between the averaging unit that averaging unit spacing P2 of the 1st terminal wiring part 34 is relative to lower section detecting electrode 22 The 1/n natural number of more than 4 and less than 20 (n be) is preferably become away from P1.In other words, preferably by the average list of lower section detecting electrode 22 Unit's spacing P1 is set to the integral multiple of averaging unit spacing P2 of the 1st terminal wiring part 34.Thus, detection electricity below composition is not damaged The metallic conductor fine rule 28 of pole 22 with constitute the 1st terminal wiring part 34 being connected (seriality) of metallic conductor fine rule 28 and can Detecting electrode the 22 and the 1st terminal wiring part 34 below connection.Therefore, the flowing of electric current becomes smooth and easy.And, also have and be difficult to send out The raw effect disconnected.
On the other hand, the 2nd touch panel with the 2nd resin film 24 of conducting strip 12 in the same manner as the 1st resin film 20 by The transparent body is constituted.As the preference of the transparent body, the above-mentioned transparent body can be enumerated.
As shown in Figures 1 and 5, the top detecting electrode 26 being formed at the 2nd resin film 24 is respectively provided with along the 2nd direction (y Direction/length direction) pattern of multiple bandings that extends.Top detecting electrode 26 towards the 1st direction (with the 2nd direction just has The direction handed over: x direction) the width size of regulation, and multiple configure side by side along this x direction.
Each top detecting electrode 26 in the same manner as lower section detecting electrode 22 also by metallic conductor fine rule 28 intersected with each other and Formed.The 3rd unit 40 surrounded by metallic conductor fine rule 28 is formed with this intersection.
The lattice of top detecting electrode 26 can be set to the pattern or random that shapes in the same manner as lower section detecting electrode 22 Pattern.Wherein, preferably lower section detecting electrode 22 is set to random pattern, top detecting electrode 26 is set to shape pattern side Formula.This is because, according to which, it is possible to take into account folded stricture of vagina and the coloured noise of pattern of pixels with display device.It addition, the 3rd is single The preferred live width of metallic conductor fine rule 28, preferred averaging unit spacing and reason thereof in unit 40 are identical with the 1st unit 30, therefore Description is omitted.
As shown in Figures 1 and 5, above each, the one end of detecting electrode 26 is electrically connected with the 2nd end via the 2nd wire connecting portion 42 Sub-wiring part 36.So, by arranging the 2nd wire connecting portion 42, from the electric current of the 2nd terminal wiring part 36 detecting electrode 26 upward Flowing becomes smooth and easy, has the effect of the sensitivity improving touch panel 14.Alternatively, it is also possible to be to be not provided with the 2nd wire connecting portion 42 And using top detecting electrode 26 and the structure directly electrically connected as the 2nd terminal wiring part 36 of periphery distribution.
The structure being provided with the 2nd wire connecting portion 42 is illustrated, such as from the 2nd wiring of the top detecting electrode 26 of odd column The 2nd terminal wiring part 36 set out in portion 42 is with one side of the right extended in the x-direction along the 2nd resin film 24, and then refers to After the mode of the 1st portion of terminal 35 side changes advance route, attached with being arranged at the 1st portion of terminal 35 across the 2nd resin film 24 Near right side the 2nd portion of terminal 44 electrically connects.
Further, the 2nd terminal wiring part 36 from the 2nd wire connecting portion 42s of the top detecting electrode 26 of even column with along One side of the left extended in the x-direction of the 2nd resin film 24, so point to the 1st portion of terminal 35 side mode change anterior approach After line, electrically connect with being arranged at left side the 2nd portion of terminal 46 near the 1st portion of terminal 35 across the 2nd resin film 24.
2nd terminal wiring part 36 in the same manner as the 1st terminal wiring part 34 also by metallic conductor fine rule 28 intersected with each other and Formed.With this intersection as in Fig. 5 enlarged representation surrounded by metallic conductor fine rule 28 by being formed justifying the part of encirclement 4th unit 48.It addition, when arranging 2 wire connecting portion 42, the net that the 2nd wire connecting portion 42 is also formed by metallic conductor fine rule 28 Trellis becomes.The grid cell shape of the 2nd wire connecting portion 42 can be the shape identical with the 4th unit 48, it is also possible to different.
The lattice of the 2nd terminal wiring part 36 can be set to the pattern that shapes in the same manner as the 1st terminal wiring part 34.Separately Outward, the preferred live width of the metallic conductor fine rule 28 in the 4th unit 48, preferred averaging unit spacing and reason thereof and the 2nd unit 38 Identical, therefore description is omitted.In order to reduce parasitic capacitance, the 1st terminal wiring part the 34 and the 2nd terminal wiring part 36 is preferred It is positioned at nonoverlapping position.
As in figure 2 it is shown, the 1st resin film the 20 and the 2nd resin film 24 is via optics adhesive linkage (OCA:Optocal Clear Adhesive) 50 joints.Now, in the 1st resin film 20, it is formed with lower section detecting electrode the 22 and the 1st terminal distribution The face of portion 34 grade becomes side, lower surface, in the 2nd resin film 24, is formed with top detecting electrode the 26 and the 2nd terminal wiring part 36 Deng face become side, lower surface.The thickness of OCA50 is preferably 20 μm～300 μm, more preferably 25 μm～200 μm.
Further, in the upper surface of the 2nd resin film 24 via OCA50 fit closure flap glass 18.The composition of cover-plate glass 18 Material such as can be preferably used glass, strengthening glass, sapphire or Merlon (PC) or polymethyl methacrylate (PMMA) resin etc. such as.
In touch panel 14 involved by present embodiment, as the laminated conductive sheet 16 of sensor main body such as along figure Sweep C1 and C2 being illustrated by the broken lines in 1 is bent.It addition, in laminated conductive sheet 16, more more outward than sweep C1 and C2 Part be bent to the display device side paper of the Fig. 1 (inboard).That is, touch panel 14 is to be formed 2 sides by bending Thus the 3D shape body of concave shape.
When carrying out above-mentioned bending, as shown in FIG. 6 and 7, top detecting electrode 26 one end, from the top of odd column The 2nd terminal wiring part 36 that detecting electrode 26 sets out is bent.With this bending, the 1st resin film the 20 and the 2nd resin film 24 Crooked position, the especially foreign side of this crooked position is extended.
As it has been described above, top detecting electrode 26 and the 2nd terminal wiring part 36 are formed as metal grill pattern.Therefore, Top detecting electrode 26 and the 2nd terminal wiring part 36 are followed the extension of the 2nd resin film 24 and are extended.Therefore, top detection electricity Pole the 26 and the 2nd terminal wiring part 36 is not susceptible to disconnect.
It is additionally, since top detecting electrode the 26 and the 2nd terminal wiring part 36 and is positioned at the lower surface of the 2nd resin film 24, because of This is at crooked position, and top detecting electrode the 26 and the 2nd terminal wiring part 36 is towards inner side.At crooked position, the elongation of inner side Elongation less than outside.Therefore, in this case, compared with the situation in the outside being positioned at crooked position, top detecting electrode The elongation of the 26 and the 2nd terminal wiring part 36 diminishes.So, elongation diminishes and also contributes to prevent top detecting electrode 26 and the The disconnection of 2 terminal wiring parts 36.
Further, as shown in Figure 1, the bearing of trend (y direction) of top detecting electrode the 26 and the 2nd terminal wiring part 36 relative to Sweep direction (x direction) tilts.Further, in the 3rd unit the 40 and the 4th unit 48, sweep C1 and C2 is to lead relative to metal The mode that body fine rule 28 tilts is intersected.Therefore, the 3rd unit the 40 and the 4th unit 48 shows sufficient intensity for bending.I.e., not Easily disconnect.
The metallic conductor fine rule 28 preferred angle relative to sweep C1 and C2 is 20 °～70 °.This by being set to Angle, is less susceptible to disconnect.Especially, further preferably between 25 °～40 ° or between 50 °～65 °.At such angular range In, it is possible to take into account preventing and the raising of visuognosis degree of disconnection.
Here, the angle of inclination that metallic conductor fine rule 28 is relative to sweep C1 and C2 refers to sweep C1 and C2 and metal The angle of the acute angle that conductor fine rule 28 intersects.Such as, the angle, θ shown in Fig. 5 is equivalent to metallic conductor fine rule 28 relative to bending The angle of inclination of line C2.
Especially, preferably will constitute below the inclination relative to sweep C1 and C2 of the metallic conductor fine rule 28 of detecting electrode 22 The metallic conductor fine rule 28 of angle and composition the 1st terminal wiring part 34 angle of inclination relative to sweep C1 and C2 is above-mentioned excellent It is set to identical in the range of tilt angles of choosing.For the metallic conductor fine rule 28 of detecting electrode 26 above constituting relative to sweep The inclination relative to sweep C1 and C2 of the metallic conductor fine rule 28 of the angle of inclination of C1 and C2 and composition the 2nd terminal wiring part 36 Angle is the most identical.
It addition, when arranging 1 wire connecting portion 32, preferably by constitute the metallic conductor fine rule 28 of the 1st wire connecting portion 32 relative to Below the angle of inclination of sweep C1 and C2, composition, the metallic conductor fine rule 28 of detecting electrode 22 is relative to sweep C1's and C2 The metallic conductor fine rule 28 of angle of inclination and composition the 1st terminal wiring part 34 angle of inclination relative to sweep C1 and C2 is upper It is set to identical in stating preferred range of tilt angles.When 2 wire connecting portion 42 is set also in the same manner as it, preferably comprise the 2nd wiring The metallic conductor fine rule 28 in portion 42 angle of inclination relative to sweep C1 and C2, constitute above the metallic conductor of detecting electrode 26 The fine rule 28 angle of inclination relative to sweep C1 and C2 and to constitute the metallic conductor fine rule 28 of the 2nd terminal wiring part 36 relative It is set to identical in above-mentioned preferred range of tilt angles in the angle of inclination of sweep C1 and C2.
According to as above reason, top detecting electrode the 26 and the 2nd terminal wiring part 36 can be suppressed to disconnect.Therefore, it is possible to it is anti- Only result from the disconnection of the 2nd terminal wiring part 36 and cause resistance to rise.Therefore, it is possible to constitute the three-dimensional that detection sensitivity is good Touch panel 14.
It addition, in Fig. 1, by adjacent lower section detecting electrode 22 each other and adjacent top detecting electrode 26 each other it Between be set to blank, but preferably adjacent lower section detecting electrode 22 each other or above detecting electrode 26 each other in extremely Few one configuration the 1st stress dispersion portion.
1st stress dispersion portion and detecting electrode (lower section detecting electrode 22 or top detecting electrode 26) and periphery distribution (the 1st terminal wiring part the 34 or the 2nd terminal wiring part 36) both insulation, and have and the 1st wire netting constituting detecting electrode The surface density that lattice are identical.Here, the surface density of metal grill is to lead with the metal being constituted metal grill in a certain unit are The amount of body fine rule represents, as shown in above-mentioned (1) formula, it is possible to by by volume weight density α of metallic conductor fine rule, wire netting The metallic conductor fine rule occupation rate in lattice portion and the thickness of metallic conductor fine rule are multiplied and obtain.By surface density is set as phase With, there is the effect of diffusion-induced stress.In this specification, " surface density is identical " refers to that surface density is substantially the same.Specifically, fixed Justice is the difference of surface density situation within 5%.
The wire netting trellis that 1st stress dispersion portion is preferably intersected by metallic conductor fine rule in the same manner as detecting electrode Become.About forming the preferable shape of unit of metal grill, between lower section detecting electrode 22 metal grill each other be with The mesh shape that 1st unit 30 is identical, is identical with the 3rd unit 40 between top detecting electrode 26 metal grill each other Mesh shape.In this specification, " identical mesh shape " refers to that the intersecting angle of unit, spacing and live width are identical.Even if It is the shape of a part of opening (disconnection) of unit, as long as intersecting angle, spacing and live width are identical, is then also defined as " identical Mesh shape ".Shown in Fig. 8, detecting electrode 26 clamps an example in the 1st stress dispersion portion 52 each other up.
The mode in the 1st further preferred stress dispersion portion be the metallic conductor fine rule forming the 1st stress dispersion portion with The metallic conductor fine rule 28 constituting detecting electrode (lower section detecting electrode 22 or top detecting electrode 26) is identical material.By inciting somebody to action 1st stress dispersion portion uses the material identical with the metallic conductor fine rule 28 constituting detecting electrode to constitute and is set to and detection electricity The most identical mesh shape, not only produces the effect of above-mentioned stress dispersion (diffusion), also produces the figure that can reduce detecting electrode Case visualization or the visual effect of line of metallic conductor fine rule, the most particularly preferably.
Further, by the material of the metallic conductor fine rule in the 1st stress dispersion portion and thickness being set to and constituting detecting electrode Metallic conductor fine rule 28 identical and the mesh shape in the 1st stress dispersion portion is set to and constitute detecting electrode metal grill phase With, it is possible to obtain the 1st stress dispersion portion that surface density is identical with detecting electrode.If the difference of the identical i.e. surface density of surface density falls into Within 5%, then can be formed on the metal grill forming the 1st stress dispersion portion and disconnect.
When arranging the 1st stress dispersion portion, further preferably it is also provided with stress dispersion portion (each other at periphery distribution 2 stress dispersion portions).2nd stress dispersion portion and detecting electrode (lower section detecting electrode 22 or top detecting electrode 26) and periphery Both insulation of distribution (the 1st terminal wiring part the 34 or the 2nd terminal wiring part 36), and have and the 2nd gold medal constituting periphery distribution Belong to the surface density that grid is identical.Surface density is as defined above, obtains diffusion-induced stress by being set to identical by surface density Effect is the most same as described above.
The wire netting trellis that 2nd stress dispersion portion is preferably intersected by metallic conductor fine rule in the same manner as periphery distribution Become.About forming the preferable shape of unit of metal grill, between the 1st terminal wiring part 34 metal grill each other be with The mesh shape that 2nd unit 38 is identical, between the 2nd terminal wiring part 36 metal grill be each other and the 4th unit 48 phase Same mesh shape.
The mode in the 2nd further preferred stress dispersion portion is that the metallic conductor fine rule forming the 2nd stress dispersion portion is The material identical with the metallic conductor fine rule 28 constituting periphery distribution (the 1st terminal wiring part the 34 or the 2nd terminal wiring part 36).Logical Cross and the 2nd stress dispersion portion is made up of the material identical with the metallic conductor fine rule constituting periphery distribution and is set to and periphery distribution Identical mesh shape, not only produces above-mentioned stress spread effect, also produce can reduce periphery distribution pattern visualization or The visual effect of line of metallic conductor fine rule, the most particularly preferably.
Further, by the material of the metallic conductor fine rule in the 2nd stress dispersion portion and thickness being set to and constituting periphery distribution Metallic conductor fine rule identical and the mesh shape in the 2nd stress dispersion portion is set to and constitute periphery distribution metal grill phase With, it is possible to obtain the 2nd stress dispersion portion that surface density is identical with detecting electrode.If the difference of the identical i.e. surface density of surface density falls into Within 5%, then can be formed on the metal grill forming the 2nd stress dispersion portion and disconnect.
So, when being provided with stress dispersion portion each other at lower section detecting electrode 22, further preferably the adjacent the 1st Terminal wiring part 34 is also provided with stress dispersion portion each other.Further, stress it is provided with each other when detecting electrode 26 up During dispersion portion, further preferably it is also provided with stress dispersion portion each other at the 2nd adjacent terminal wiring part 36.Shown in Fig. 9 Detecting electrode 26 has clamped the 1st stress dispersion portion 52 each other and has the most also set at the 2nd terminal wiring part 36 up There is example during the 2nd stress dispersion portion 54.
It addition, in Fig. 9, show the part in stress dispersion portion 54 for the ease of understanding, but actually stress disperse Portion 54 is formed at the whole region in periphery distribution region.Further, the actual average unit interval in stress dispersion portion 54 and Unit the 4th 48 is identical.
By arranging this stress dispersion portion 52 and 54 (the 1st stress dispersion portion or the 2nd stress dispersion portion), stress is in detection Region or periphery distribution region are uniformly dispersed.Therefore, it is possible to prevent the 1st resin film the 20 or the 2nd resin film 24 locality Extend.Therefore, it is possible to suppression disconnects or resistance rises further.
And it is possible to lower section detecting electrode 22 or above the stress that is internally formed of at least one in detecting electrode 26 delay And portion.Delay by a part for top detecting electrode 26 is formed stress along the gutter that bearing of trend cuts shown in Figure 10 An example with portion 56.
In this case, if the 2nd resin film 24 corresponding with the inside of top detecting electrode 26 (stress easing portion) Position extend, the most produced stress is relaxed by stress easing portion 56.It can thus be avoided stress is up Detecting electrode 26 is propagated, therefore can suppress the progress that above constituting, the metallic conductor fine rule 28 of detecting electrode 26 disconnects.Its As a result, it is possible to prevent the width of the stress easing portion of the resistance rising of top detecting electrode 26 relative to top detection electricity further The electrode width of pole 26 is preferably 20%～60%.According to this scope, it is possible to more effectively relax stress, it is possible to prevent metal from leading The disconnection of body fine rule.
It addition, in Figure 10, show stress easing portion 56 with gutter, but stress easing portion 56 be preferably by leading metal Body fine rule 28 locality disconnects and is formed.By this structure, can obtain preventing the visual effect of pattern of stress easing portion 56 Really.Disconnection width when locality disconnects is preferably 5 μm～30 μm.
Below can certainly being formed, the 1st touch panel conducting strip 10 of detecting electrode 22 is set to according to Fig. 8～figure The structure of 10.
The lattice narrower in order to obtain live width, lower section detecting electrode 22 and top detecting electrode 26 can preferably pass through The etching or the micro-touch printed patterns that employ photoetching process form method, silver salt method or cloudy metallic completion method of carving and are formed.For Repeat to obtain substantial amounts of pattern, more preferably silver salt method.
It is the method utilizing micro-touch print process to obtain the narrower pattern of live width that so-called micro-touch printed patterns forms method.Here, Micro-touch print process is the die using and having resilient polydimethylsiloxane, and as ink, thiol solution is made itself and auri material Contact and make the pattern of monomolecular film method (with reference to Whitesides write, Angew.Chem.Int.Ed., 1998 the 37th Roll up page 550).
The representative processes that micro-touch printed patterns forms method is the most as follows.I.e., first, by metal coated in base material (such as, by silver sputter in PET base material).
Then, micro-touch print process is used, by the mask press back of monomolecular film to the base material being coated with metal.Then, except Beyond pattern below mask, removed the metal coating base material by etching.
About above content, its specific works etc. is described in the ＜ 0104 of Japanese Unexamined Patent Application Publication 2012-519329 publication in detail ＞ section.
Further, cloudy carve metallic completion method be formed by anti-aging drug is become latticed latticed groove and This groove is filled the method being dispersed with the ink of metallic and form metal grill.Such as can be suitable for International Publication Method described in No. 2013/012260.
On the other hand, silver salt method is by being exposed the sensitive material of the layer having containing photonasty silver salt and developing And the method obtaining the pattern in latticed metallic conductor fine rule 28.Its specific works etc. is described in Japanese Unexamined Patent Publication in detail ＜ 0163 ＞～the ＜ 0241 ＞ section of 2009-4348 publication.
So, will be formed with the 1st resin film of lower section detecting electrode the 22 and the 1st wire connecting portion the 32, the 1st terminal wiring part 34 20 and be formed top detecting electrode the 26 and the 2nd wire connecting portion the 42, the 2nd terminal wiring part 36 the 2nd resin film 24 via OCA50 Fit and form stacking conducting strip 16.Now, make lower section detecting electrode 22 and top detecting electrode 26 with by the 1st resin film 20 Mode sandwiched therebetween is intersected.
Then, the end of stacking conducting strip 16 is bent along sweep C1 and C2 shown in Fig. 1.To this end, such as can be right Laminated conductive sheet 16 carries out heating and making it soften, and keeps soft state to use mould molding for bending. As forming method, the empty molding of pressure, vacuum forming, hot-forming etc. can be exemplified, but the preferably empty molding of pressure and vacuum forming.
It addition, the 2nd resin film 24 of laminated conductive sheet 16 of bending fitted cover-plate glass 18 via OCA50.Thus, Obtain the touch panel 14 as 3D shape body.Fill by this touch panel 14 is engaged in not shown display via OCA Put, thus obtain the display device of band three-dimensional tactile panel.
The present invention is not particularly limited to above-mentioned embodiment, can carry out each without departing from the spirit and scope of the present invention Plant change.
Such as, in this embodiment, detecting electrode 22 below the 1st resin film 20 is formed, and at the 2nd resin film 24 Detecting electrode 26 above formation but it also may as shown in figure 11, detecting electrode below the one side of same resin film 60 is formed 22 and its back side formed above detecting electrode 26.Now, OCA50 is used to will be formed with face and the cover plate of top detecting electrode 26 Glass 18 is fitted.
Or, it is also possible to as shown in figure 12, make dielectric film 62 between lower section detecting electrode 22 and top detecting electrode 26 it Between, and use OCA50 will be formed with top detecting electrode 26 resin film 60 fit with cover-plate glass 18.
Alternatively, it is also possible to as shown in figure 13, will only be in side and be formed with the resin film 60 of detecting electrode 64 via OCA50 Fit in cover-plate glass 18.During this structure, can use in No. 2012/0262414 description of U.S. Patent Application Publication No. etc. The disclosed electrode structure not having cross part.
Under any circumstance, all can be curved in the way of detecting electrode becomes the outside of crooked position.
Embodiment 1
[embodiment 1,2, comparative example 1～5]
In accordance with the following methods, touch panel conducting strip 10 and 12 is produced.Detecting electrode is set to the rhombus being made up of silver The mesh shape (with reference to Fig. 5) of shape, is set as live width 4 μm, unit interval is set as 200 μm.On the other hand, terminal is joined Line portion (periphery distribution) is set to the mesh shape of the diamond shape being made up of silver, and live width is set as 4 μm, and unit interval is set as 20μm.Further, wire connecting portion is also set to the mesh shape of the diamond shape being made up of silver, live width is set as 4 μm, by unit interval It is set as 20 μm.
These detecting electrodes, wire connecting portion and terminal wiring part are by utilizing photoetching, etching mode to spatter film forming in thickness The Ag films of the thickness 100nm in the PET film of 100 μm carries out pattern formation and concurrently forms.It addition, detecting electrode, wiring The thickness of portion and terminal wiring part is 100nm.Further, relative to sweep C1 and C2, the inclination angle of the silver wire of grid will be formed Degree is set as 60 °.The aperture opening ratio of the grid of detecting electrode now is 95.4%.
Then, as in figure 2 it is shown, use OCA#8146-2 (thickness 50 μm) the laminating touch panel conducting strip of 3M company 10 and 12 and produce laminated conductive sheet.It addition, by hot-forming, the end of this laminated conductive sheet is implemented with in bending On line C1 and C2, radius of curvature is set to 2.0mm and detecting electrode and terminal wiring part becomes the three-dimensional one-tenth that the mode of inner side bends Type is processed.Then, 3M company OCA#8146-3 (thickness 75 μm) is used to be led in stacking by the strengthening glass gluing of thickness 0.3mm The touch panel of the so-called narrow edge of Fig. 2 is produced on electricity sheet.As embodiment 1.
The structure being changed to be not provided with wire connecting portion and directly electrically connected with terminal wiring part by detecting electrode, in addition, Touch panel is produced by conducting strip according to embodiment 1.As embodiment 2.
Further, the most so-called comprehensive coating shape of wire shaped of 1 wide cut that terminal wiring part is set to live width 30 μm, and It is not set to mesh shape, in addition, is produced touch panel according to embodiment 1 by conducting strip.As comparative example 1.
It addition, the detecting electrode being made up of PEDOT/PSS is formed as the wire shaped of 1 wide cut rather than is formed as net Trellis shape.Further, PEDOT/PSS the wire connecting portion in mesh shape and terminal wiring part are formed.In addition to the above, according to reality Execute example 1 and produced touch panel by conducting strip.As comparative example 2.It addition, PEDOT/PSS is as being doped with polyphenyl second Poly-(3,4-ethylene dioxythiophene) (PEDOT) of alkene sulfonic acid (PSS) and known.
Further, the copper of thickness 150nm form detecting electrode, in addition, produced by conducting strip tactile according to embodiment 1 Touch panel.As comparative example 3.That is, in the touch panel of comparative example 3, detecting electrode is made up of copper, and wire connecting portion and periphery are joined Line is made up of silver.In a word, detecting electrode and metal that periphery distribution is mutually different kind.
Further, the silver paste material containing binding agent form terminal wiring part, and the thickness of this terminal wiring part is set to 10 μ M, is set to live width 10 μm, in addition, is produced touch panel according to embodiment 1 by conducting strip.As comparative example 4.
The detecting electrode of the touch panel of comparative example 4 and wire connecting portion are fine silver, in contrast, periphery distribution is by containing bonding The silver composition of agent.In a word, the main material of detecting electrode and periphery distribution is silver, but periphery distribution contains binding agent, in this, It not identical material with detecting electrode and periphery distribution.Further, the thickness of periphery distribution also with detecting electrode and periphery distribution Different.
It addition, both detecting electrode and terminal wiring part are set to the generally square shape shown in Figure 14 grid and Live width is set to 10 μm.The live width of detecting electrode and terminal wiring part is all set as 4 μm, and the unit interval of detecting electrode is set as 200 μm, the unit interval of terminal wiring part is set as 20 μm.In addition, touch surface is produced according to embodiment 1 by conducting strip Plate.As comparative example 5.It addition, the aperture opening ratio of the grid of detecting electrode now is 96.0%.
In this comparative example 5, sweep C1 and C2 is in parallel and vertical relation with the silver wire of formation grid.That is, silver is thin The bearing of trend of line does not tilts relative to sweep C1 and C2.
Further, for each touch panel, the visuognosis degree of open failure and the sensitivity of touch panel, electrode is carried out Evaluate.Result is summed up and is shown in table 1.It addition, for open failure, disconnection will do not observed and electrode resistance will be less and excellent Different situation is evaluated as " AA ", will not observe disconnection and electrode resistance is slightly higher but situation for practicality the most no problem upper degree It is evaluated as " A ", disconnection will not observed but situation that electrode resistance is the degree being impermissible in practicality is evaluated as " B ", will observe " C " cannot be evaluated as practical situation to a lot of disconnection.Table 1 illustrates position the most in the lump that occur to disconnect.
Further, about sensitivity, carry out operating (touch), time the most excellent, be evaluated as " AA ", there is no special problem and good Being evaluated as " A " time good, be evaluated as " B " during sensitivity permissible degree upper for practicality, sensitivity is the journey being impermissible in practicality It is evaluated as " C " during the position that degree or existence cannot detect.
It addition, about the visuognosis degree of electrode, will be unable to visuognosis electrode and do not observe the most excellent of folded stricture of vagina Assessment of levels be " AA ", will have observed that electrode but do not observe the good assessment of levels of folded stricture of vagina for " A ", can vision distinguish Recognizing electrode and less folded stricture of vagina being can be observed but be practical, the most no problem assessment of levels is " B ", will have observed that electrode and folds It is " C " that stricture of vagina exceedes the assessment of levels of permissible range.
Being clear that by table 1, by live width being set to below 5 μm, and both detecting electrode and periphery distribution being set to Mesh shape, and make the metallic conductor fine rule of formation grid tilt relative to sweep C1 and C2, such that it is able to obtain observing not To disconnecting and sensitivity is excellent and touch panel that visuognosis degree is good.Further, from embodiment 2, connect being not provided with Line portion and detecting electrode link (being directly connected to) terminal wiring part structure in, have also been obtained the effect equal with embodiment 1.
[embodiment 3～6]
Make the stress dispersion portion being made up of silver grid (live width 4 μm, spacing 200 μm, thickness 100nm) between adjacent detection Each other, described silver grid is by the sputtering silver thin film structure in the mesh shape identical with the silver-colored grid constituting detecting electrode for electrode Become (with reference to Fig. 8), in addition, produce conducting strip according to embodiment 1, and produced touch panel by this conducting strip.Will It is as embodiment 3.
Make stress dispersion portion between adjacent detecting electrode each other, and make by silver grid (live width 4 μm, spacing 20 μ M, thickness 100nm) the stress dispersion portion that constitutes between adjacent terminal wiring part each other, described silver grid by constitute The sputtering silver thin film of the mesh shape that the silver-colored grid of periphery distribution is identical is constituted.In addition, produce similarly to Example 1 Conducting strip shown in Fig. 9, and produced touch panel by this conducting strip.As embodiment 4.
The stress easing portion of width 2.0mm is set in the inside of the detecting electrode of electrode width 4.0mm, in addition, with Embodiment 1 similarly produces the conducting strip shown in Figure 10.Then, this conducting strip touch panel is produced.As reality Execute example 5.
The width disconnected with width 15 μm local by silver fine rule is set in the inside of the detecting electrode of electrode width 4.0mm The stress easing portion of 2.0mm, in addition, produces conducting strip similarly to Example 4.Then, this conducting strip produce Touch panel.As embodiment 6.
For each touch panel of above embodiment 3～6, also to open failure and the sensitivity of touch panel 14, electricity The visuognosis degree of pole is evaluated.Result is shown in the lump table 1.It addition, about with open failure, sensitivity and electrode Opinion rating " AA " that visuognosis degree is relevant～the concrete evaluation content of " C ", as mentioned above.
As shown in Table 1, embodiment 3～6 be do not observe disconnection and sensitivity is excellent and visuognosis degree is good Touch panel.Especially, the visuognosis degree of embodiment 3,4 and 6 is the best.Trace it to its cause and be because, in embodiment 3,4 and 6, Make stress be uniformly dispersed by arranging stress dispersion portion, be therefore possible to prevent resin film locality to extend.And be because of For, in embodiment 5 and 6, by stress easing portion is set in the inside of detecting electrode and when resin film extends produced Stress is relaxed.It addition, in embodiment 3,4 and 6, owing to there is grid at whole touch panel, therefore None-identified detection The pattern of electrode, visuognosis degree is excellent.
As known from the above, by arranging stress dispersion portion or arranging stress easing portion in the inside of detecting electrode, prevent Disconnect, improve sensitivity, and the visuognosis degree of electrode becomes better.
[embodiment 7～14]
By the silver-colored fine rule of the formation grid angle of inclination relative to sweep C1 and C2 by the touch panel of embodiment 1 60 ° of any one being changed in 10 °, 22.5 °, 30 °, 37.5 °, 45 °, 52.5 °, 67.5 ° or 80 ° and produce touch panel. To each be set to embodiment 7,8,9,10,11,12,13 and 14.
For each touch panel of above embodiment 7～14, also to open failure and the sensitivity of touch panel, electrode Visuognosis degree evaluated.Result is shown in the lump table 1.It addition, about with the regarding of open failure, sensitivity and electrode Feel identification degree be correlated with opinion rating " AA "～the concrete evaluation content of " C ", as mentioned above.
As shown in Table 1, embodiment 7～14 be do not observe disconnection and sensitivity also fully and also visuognosis degree does not has yet Problematic touch panel.Especially, angle of inclination embodiment 8～13 in the range of 20 °～70 ° is similarly to Example 1 Not observing disconnection, and electrode resistance is the least and excellent, the sensitivity of touch panel is the best.It addition, angle of inclination exists Embodiment 9,10 and 12 visuognosis degree similarly to Example 1 in the range of 25 °～40 ° or 50 °～65 ° is the best.
Symbol description
10-the 1st touch panel conducting strip, 12-the 2nd touch panel conducting strip, 14-touch panel, 16-laminated conductive Sheet, 18-cover-plate glass, 20-the 1st resin film, detecting electrode below 22-, 24-the 2nd resin film, detecting electrode above 26-, 28,28p～28s-metallic conductor fine rule, 30-the 1st unit, 32-the 1st wire connecting portion, 34-the 1st terminal wiring part, 35-the 1st terminal Portion, 36-the 2nd terminal wiring part, 38-the 2nd unit, 40-the 3rd unit, 42-the 2nd wire connecting portion, the 2nd portion of terminal on the right side of 44-, 46-is left Side the 2nd portion of terminal, 48-the 4th unit, 50-optics adhesive linkage (OCA), 52,54-stress dispersion portion, 56-stress easing portion, 60- Resin film, 62-dielectric film, 64-detecting electrode.

Claims (16)

1. a touch panel conducting strip, it has resin film, and described resin film is in the three-dimensional shaped with bending section Shape, described resin film is formed: multiple detecting electrodes, and it is configured at detection region；And multiple periphery distribution, it is configured at week Distribution region, limit, for being electrically connected with portion of terminal by described detecting electrode, described touch panel conducting strip is characterised by,
The 1st netted metal grill that described detecting electrode is intersected by metallic conductor fine rule and constitutes is constituted,
Described periphery distribution is by the metallic conductor fine rule with the described identical material of metallic conductor fine rule forming described detecting electrode The 2nd netted metal grill intersected and constitute is constituted, and
The live width of described 1st metal grill is below 5 μm, constitutes the described of described 1st metal grill and described 2nd metal grill The bearing of trend of metallic conductor fine rule tilts relative to the sweep direction of the described bending section of described resin film.
Touch panel conducting strip the most according to claim 1, wherein,
Have described in the region of described resin film at least one in comprising described detecting electrode or described periphery distribution Bending section.
Touch panel conducting strip the most according to claim 1 and 2, wherein,
The bearing of trend of described metallic conductor fine rule relative to the sweep direction of the described bending section of described resin film with 20 ° ～the angle of 70 ° tilts.
Touch panel conducting strip the most as claimed in any of claims 1 to 3, wherein,
The average meshes of described 2nd metal grill is smaller than the average meshes spacing of described 1st metal grill.
Touch panel conducting strip the most according to claim 4, wherein,
The average meshes spacing of described 2nd metal grill is 10 μm～50 μm.
Touch panel conducting strip the most as claimed in any of claims 1 to 5, wherein,
Described 1st metal grill is identical with the live width of described 2nd metal grill.
Touch panel conducting strip the most as claimed in any of claims 1 to 6, wherein,
In described detection region, at least at adjacent described detecting electrode there is the 1st stress dispersion portion each other, described 1 stress dispersion portion and described detecting electrode and the insulation of described both periphery distributions, and have identical with described 1st metal grill Surface density.
Touch panel conducting strip the most according to claim 7, wherein,
Described 1st stress dispersion portion is made up of following metal grill, described metal grill by with the institute constituting described detecting electrode The metallic conductor fine rule stating the identical material of metallic conductor fine rule intersects and constitutes, and in the net identical with described 1st metal grill Trellis shape.
9. according to the touch panel conducting strip described in claim 7 or 8, wherein,
In described periphery distribution region, at least at adjacent described periphery distribution, there is the 2nd stress dispersion portion, institute each other State the 2nd stress dispersion portion and described detecting electrode and the insulation of described both periphery distributions, and have and described 2nd metal grill Identical surface density.
Touch panel conducting strip the most according to claim 9, wherein,
Described 2nd stress dispersion portion is made up of following metal grill, described metal grill by with the institute constituting described periphery distribution The metallic conductor fine rule stating the identical material of metallic conductor fine rule intersects and constitutes, and in the net identical with described 2nd metal grill Trellis shape.
11. touch panel conducting strips as claimed in any of claims 1 to 10, wherein,
The described metal being internally formed the described detecting electrode of composition of at least 1 detecting electrode in described detecting electrode is led The stress easing portion that body fine rule disconnects.
12. touch panel conducting strips according to claim 11, wherein,
Described stress easing portion is to be formed by being disconnected partly by the described metallic conductor fine rule constituting described detecting electrode 's.
13. according to the touch panel conducting strip described in any one in claim 1 to 12, wherein,
Described 1st metal grill be shaped as random pattern.
14. according to the touch panel conducting strip described in any one in claim 1 to 13, wherein,
Described 2nd metal grill be shaped as shape pattern.
15. according to the touch panel conducting strip described in any one in claim 1 to 14, wherein,
Described resin film be curved as inner side by will be formed with the face of described detecting electrode and described periphery distribution and In 3D shape.
16. 1 kinds of capacitive touch panels, it possesses in claim 1 to 15 touch panel described in any one with leading Electricity sheet.
CN201580019272.9A 2014-05-16 2015-03-09 Conductive sheet for touch panel and capacitive touch panel Active CN106170751B (en)

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US10055076B2 (en) 2018-08-21
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US20170010720A1 (en) 2017-01-12
CN106170751B (en) 2019-12-24

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